C312312111133131212111133133313231333133313331323221211111313211   >>    C31231211113313121211113313331323133313331333132322121111131321   <<    C312312111133131212111133133313231333133313331323221211111313213   >>      C312312111133131212111133133313231333133313331323221211111313212   >>